noun Etymology: probably from thyronine, the amino acid of which thyroxine is a derivative + 4, the number of iodine atoms it contains Date: 1974 thyroxine
T4
Meaning of T4 in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012